Fuel-pump for internal-combustion engines.



K. J. E. HESSELMAN.

FUEL PUMP FOR INTERNAL COMBUSTION ENGINES. APPLICATION FILED MAR. 29, 1913;

Patented NOV. 11, 1913.

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nuns-rune non r'n'rnnnnn-connus'rmn nrvernns.

ttncotncntion of Letters E etent.

ll ntented ltinv'm ll t Z '0 all whom it may concern:

Be it known that it, hiivn'r dorms ELIAS HnssermAu,-s.c1t1zen of the tumgdom of Sweden, residing at Eis-itsjti- Storlingen, Stockholm, Sweden, have invented new end vent the fuel pump or pumps from deliver ing fuel to the engine until the letter, otter the controlling members thcreot hove been adjusted for the new direction of movement, has changed its direction of rotution.

The object of the present invention is to provide simple and relinble means which will cause the fuel pump to cease uutomuti rally to deliver fuel as soon as the controllinp members of the engine are adjusted for reversal and to commence to deliver tuel us soon as the englnehas changed 'ltsdiroction ct rotation.

The invention consists in the combine lions and arrangements of ports hereinutter set torth and pointed out in the claims.

in the accom shying drawing l have shown one embmment of my invention.

Figure 1 shows it sectional view of o tuel ump and s driving device for the some. in. 2 shows a section on line AB of Fig. 1. Referring to the drawing, 1 indicates a fuel pump of well known construction the plunger 2 of which is connected with on urm 3 of o ring 4 on an eccentric 5 which may be made integrul with or rigidl secured to a sleeve 6 or the like which is rotatably mounted on the crank she of the engine or on an arbitrary shaft 7 adapted to be driven by the engine. in said sleeve 6 are pivotnily mounted two puwls 8 and 9 which are actuated by springs 10 end 11 respectively, tending to hem the puwls in engagement with corresponding tooth-like notches in the shalt 7. 0n the latter is further mounted at longitudinally sliduble sleeve 12 surrounding the one end of the sleeve 6. The sleeve t2 may be displaced uriully tor instance by means of a hand lever 13, connected with reversing mechanism aduted to be connected to the controlling 111cm ore for the valves,

CZtmS and the like which should be adjusted when the engine is to be reversed. The sleeve 12' is inside formed with an annular groove 14 which when it is in position opposite either of the pzrvvls 8, it allows the spring thereof to bring; the pnwl into ongugeinent. with the shniit while the other portions ,ot the sleeve 12 prevent such on engagement.-

The working oi the device described is us hollows: it the ,sleevelQ is in the position shown in Fig. l rind the shaft '2" rotntcs in the directiouot the arrow in Fig. 2 the shaft '2' turns the sleeve ti by means oi the puwl 8, the sleeve 6 in its order driving the fuel pump by means of the eccentric 5, When the engine is to be reversed and the controlling members thereof for this purpose are adjusted tortho'new direction ct rotation by means of the lever 13, the sleeve 12 is displaced longitudinally so that its groove it comes in position 0 posite the pawl 9, the latter being there y released while the pawl 8 is brought out of engage meut with the shaft 7'. r'hS long as the shaft 7 continues to rotate in the direction of the urrow in Fig". 2 it cannot turn the sleeve 6 in. spite of the puwl 9 being in operative position in as much as said; puwl slips on thcshott. The fuel pump thus does notdcliver uny tuel. As soon as the engine cud thus also the shaft 7 change their direction ct rotation, the non "2' turns the sleeve 6 by means of the pawl 9 so that thc tuel pump again is put in operation.

it will be easily understood by those skilled in the art that for the pawls 8, 9 and the corresponding notches in the shaft 7 may be substituted on other arbitrary clutching devices each n which acts in one direction of rotation of the shaft serving to impart movement to the fuel pump.

Having now described my inventiomwhut I claim as new'and desire to secure by Letters Potent is:

l. The combination with a fuel pump for internal combustion engines ofthe kind set forth, of a driving shalt, means "for trans mitting motion to the fuel pump, two clutclr ing devices serving to connect said driv ng shaft end said means for imparting motion to the fuel pump, each of said clutching do vices being capable to act only in one d1- rection of rotation of said shaft, and means for putting either ct suid clutching devices till tooth-like notches, a sleeve rotatably m0unt ed on the said shaft, means for imparting motion from said sleeve to the fuel pump, tWo pawls pivotally mounted in said sleeve and each adapted to engage one of said notches, and means for putting either of said pawls into and at the same time the otherout of operative position, substantially as and for the purpose set forth.

3. The combination with a fuel pump for internal combustion engines of the kind set forth, of a driving shaft formed With two tooth-like notches, a sleeve rotatably mount ed on the said shaft and formed with an eccentric portion, a ring loosely mounted on said eccentric portion and having an arm connected to the fuel pump, two spring actuated pawls pivotally mounted in said sleeve and each adapted to engage one of said notches, a second sleeve capable of being displaced longitudinally and formed with an annular groove, and means for displacing said second sleeve longitudinally, substantially as and for the purpose set forth. 

